Authors' Addresses (作者地址)

Seiichi Kawamura NEC BIGLOBE, Ltd. 14-22, Shibaura 4-chome Minatoku, Tokyo 108-8558 JAPAN

Phone: +81 3 3798 6085 EMail: [email protected]

Masanobu Kawashima NEC AccessTechnica, Ltd. 800, Shimomata Kakegawa-shi, Shizuoka 436-8501 JAPAN

Phone: +81 537 23 9655 EMail: [email protected]

Authors' Addresses (作者地址)​